Warm-air furnace



Marcha?, 1926. 1,663,633

A R. M. JUDD ET AL,

WARM AIR FURNACE Filed May 25, 1927 2Sheets-Sheet 1 March 27, 1928. 1,663,633

R. M. JUDDLET Ax.

WARM AIR FURNACE Filed May 23, 1927 2 Sheets-Sheet 2 CTI Patented Mar. 27, 1928.

RICHARD M. anni), ERNEsi1 c. TAYLOR, AND RALPH s. MCNANEY, orynoWAeIAo', MIcH- IGAN, AssIGNoRs'ro PREMIER WARM AIR COMPANY, oP nowAei'Ao, MICHIGAN, A

l CORPORATION or MIcHIeAi\r.`v .L

WARM-Ain PURNACE.

' n Application. filed May 23,

This invention relates generally to warm air furnaces and consists of `certain novel features of construction and combinations and arrangements of partsV as more-fully hereinafter set forth.

Figure 1 isa side elevation of a warmv air furnace with a part of the outer casing broken away;

Figure 2 is a section taken of Figure 1; Y v

Figure 3 is a section taken on line 3--3 of Figure 1.

Referring now to the drawings, the nuon line 2--2 meral 1 designates the combustion` chamber of a warm air furnace, 2 the fuel passage eX- tendiug laterally therefrom toward the front of the furnace, 3 the radiator positioned above the combustion chamber and t the outer casing spaced from and surrounding the combustion chamber. i As shown, the radiator 3 is of circulary construction having an annular passage 5 and a cross passage 6 communicating therewith atopposite sides thereof and being provided with an opening 7 in the bottom wall thereof registering with an opening in the top portion of the combustion chamber.

Heretofore it has been the practice to provide the radiator with an outlet p-assage for the products of combustion at the rear of the furnace and a clean out passage diametrically opposite the outlet passage at the front of the furnace. however, that such kan arrangement is undesirable particularly in thev molding of the radiator and also after the furnace has been assembled. Such radiators must bemade in one piece in order to insure a leak proofV casing and where only two points of sus ension are provided for the core prints o the mold, it is necessary to provide additional means for supporting the core in the mold.

In the furnace constructions now in use the arrangement is such that itis usually impractical to provide a warm air riser eX- tendiiig directly from the'front of the furnace because of the fact that the clean Aout pipe would be positioned directly below the point where the front riser would be placed and thereby block the passage of warm air ascending to the riser. However, such an p arrangement is often desirable in order to obtain the most efficient heating' arrangement and the inability to so position a riser It has been found,

1927." Serial No. 193,684.

placing of furnace at at this point has necessitated the the same off tothe side of the an angle to the front thereof.

InV the ypresent invention these objectionable features have been eliminated by providing fthe radiator with a pair of spaced clean out pipes 9 and 10 diverging outwardly from the annular passage 5 upon both sides of the front of the furnace, the outlet 8 being located at the rear .of the radiator in the usual manner. Y

By such a construct-ion it will be readily apparent that the molding operationy of the radiator is much simplified, as three points of suspension are now provided, thus eliminating the necessity of providing additional means for holding the core prints in correct position.

It will also be apparent that when applicants radiator is assembled with the rest of the furnace, the arrangement will be such that each clean out pipe will be positioned directly above and to the side of the fuel supply passage so that thewarm air rising between the combustion chamber and the outer casing 4t will be deflected upwardly in two streams 'between the fuel supply passage and each pipe. As shownby the arrows in Figures 2 and?) these streams will merge into .a single stream and continue to rise be-` tween the front wallll and the front of the radiatoi', finally entering the riser 12.

It should be stated that each pipe is provided at its outer end portion with a door 13 normally in closed position. Pivotally mounted in the cross passage 6 is a direct draft-regulator 14, which is adapted to be operated upon the openingor closing of the fuel door by any suitable mechanism (not shown) for regulating the flow of the'products of combustion through the radiator.

From the foregoing, it will be apparent that we have provided an improved form of radiator for warm air furnaces which greatly facilitates the molding operation thereof and which when assembled with the remainfder of the furnace parts provides for the ad- 'the urnaeaof a radiator having an annular channel connecting with said combustion Chamber and provided With a pair of spaced clean out passages extended laterally therefronrfabove said'y fuelV passage'k at 'each side thereof in [close proximity thereto, afront" furnace Wall having its upper portion eX- tending between said clean out passages andA spaced from the front portion of said radiator, an outer easing surrounding said.com bustion chamber and forming therewith an air. passage and aP riser`v extending directly from :theI front o "the furnace betweem said clean out passages, the arrangement being such that warm air rising Within the outer 15 'casing'will'be 'directed'bet'ween the: 'fuel and clean4` tout passages into jsaid' riser.

In testimony ""wh'e'reof We 'affix "our- "sig- 

